Solenoid actuated pilot valve for irrigation system valve
a pilot valve and valve body technology, applied in the field of valves, can solve the problems of prone to breakage, components that require significant precision for reliable operation, and high manufacturing and assembly costs
Active Publication Date: 2009-03-17
HUNTER INDUSTRIES
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- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention relates to a pilot valve sub-assembly with a solenoid actuated pilot valve. The sub-assembly includes a solenoid with a longitudinally extending member and a laterally projecting member that can seal two ports in the pilot valve housing. The solenoid has a piston with two seals that can seal two ports in the pilot valve housing. The technical effect of this invention is to provide a reliable and efficient pilot valve actuation system that can control the flow of fluid in a pilot valve system.
Problems solved by technology
This necessitates the use of relatively small pins and seals in three way solenoid actuated pilot valves that are expensive to manufacture and assemble.
These delicate components require significant precision for reliable operation and they are prone to breakage.
Method used
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Embodiment Construction
[0013]A sleeve valve 10 (FIG. 1) includes a mandrel 12 (FIG. 2) with a plurality of slots 14. A generally cylindrical elastomeric sleeve 16 surrounds the mandrel 12. A generally cylindrical rigid sleeve valve housing 18 (FIG. 1) surrounds the elastomeric sleeve 16 and defines a control chamber (not illustrated) between the elastomeric sleeve 16 and the sleeve valve housing 18 (FIG. 1). A pilot valve 20A is mounted to the sleeve valve housing 18 for opening and closing the sleeve valve 10 by turning ON and OFF a low voltage AC control signal to a non-latching solenoid 20B. The twenty-four volt AC signal is applied via a pair of wires (not illustrated) connected between a coil 22 (FIG. 2) of the solenoid 20B and an irrigation controller (not illustrated). A generally cylindrical end cap 24 of the pilot valve 20A has male threads so that it can be connected to the sleeve valve housing by screwing it into a female threaded pilot valve housing 26 integrally formed with the sleeve valve h...
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A solenoid actuated pilot valve includes a pilot valve housing defining a pilot valve chamber and a solenoid. The solenoid includes and end cap connected to the pilot valve housing, a reciprocable plunger, and a piston having a shaft with a first end connected to and end of the plunger and a second end connected to a piston head. The end cap has a bore through which the shaft of the piston reciprocates and a first port separate from the bore. A first seal on a first side of the piston head is provided for sealing a first end of the first port. A second seal on a second side of the piston head is provided for sealing a first end of a second port in the pilot valve housing.
Description
FIELD OF THE INVENTION[0001]The present invention relates to valves used to control the flow of liquids, and more particularly, to solenoid operated valves typically used to turn ON and OFF the flow of water in residential and commercial irrigation systems.BACKGROUND OF THE INVENTION[0002]In a typical irrigation system a manually programmable electronic controller selectively energizes a solenoid operated valve to cause pressurized water to be delivered to a set of sprinklers connected to a common buried PVC pipe. Each set of sprinklers is referred to as a station or zone and is supplied with pressurized water by a corresponding solenoid actuated valve. The solenoid actuated valve typically has a clam shell or bonnet configuration exemplified in U.S. Pat. No. 6,079,437 granted Jun. 27, 2000 to Beutler et al. and assigned to Hunter Industries, Inc. In a bonnet valve, pressurized upstream or inlet water passes via a small metering orifice in a central metering body to a control chambe...
Claims
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IPC IPC(8): F15B13/043
CPCF16K7/075F16K31/0627F16K31/402Y10T137/86614Y10T137/86622Y10T137/86686
Inventor CLARK, MICHAEL L.
Owner HUNTER INDUSTRIES